Clavaria gibbsiae Ramsb.

Furtado, Ariadne N. M., Daniëls, Pablo P. & Neves, Maria Alice, 2016, New species and new records of Clavariaceae (Agaricales) from Brazil, Phytotaxa 253 (1), pp. 1-26 : 7-8

Clavaria gibbsiae Ramsb. in Gibbs (1917: 187)

Basidiomata ( Fig. 1d ) 2.0−6.5 × 0.2−0.6 cm, unbranched or on one basidioma furcate, densely caespitose. Clavula white (1A1) to pale cream with age (5A2), subclavate; apex generally blunt, subacute; stipe 1.0−3.0 × 1.0−2.0 mm, distinct, smooth. Context solid, waxy, slightly brittle; taste and smell absent.

Basidiospores ( Fig. 5a ) 6.5−8.0 × 6.5−7.5 μm (Q=1.11), subglobose, hyaline, smooth, thin-walled, uniguttulate, inamyloid; hilar appendage up to 1.0 μm long. Basidia ( Fig. 5b ) 30−40 × 6.0−8.0 μm, clavate, furcate at the base and with a loop-like basal clamp; 2-sterigmate 6.0−9.0 μm long. Cystidia absent. Hymenium 52−130 μm thick, absent in stipe. Subhymenium up to 45 μm thick; hyphae 1.5−4.0 μm wide, clampless, densely interwoven. Context ( Fig. 5c ) with parallel hyphae; hyphae 12−23 μm wide, clampless, much inflated and constricted at the septa, not secondarily septate, thin-walled, loosely attached, with slightly yellow irregular intraparietal pigments; longitudinal narrow hyphae 3.0−6.0 μm wide, not interweaving.

Habitat and distribution:—In the Atlantic Forest, this species is found on soil in the shade. In Brazil it is known only from Santa Catarina (present study). It has also been recorded from Africa, Malaysia and New Guinea ( Corner 1950).

Specimens examined:— BRAZIL. Santa Catarina: Florianópolis, Morro da Lagoa , Trilha do Jipe , 27º59'43"S, 49º47'83"W, 12 November 2013, A.N.M. Furtado 363 (FLOR 56148) ; Santa Amaro da Imperatriz, Hotel Plaza Caldas da Imperatriz, Trilha da Cachoeira , 27º70’39”S, 48º80’37”W, 21 March 2014, A.N.M. Furtado 458 (FLOR 56144), ibid., 10April 2014, A.N.M. Furtado 484 (FLOR 56153). Paraná: Piraquara, Morro do Canal , 25º50’91”S, 48º97’75”W, 26 January 2014, A.C. Magnago 910 (FLOR 56143) .

Additional specimens examined:— MALAYSIA. Tembeling: Pahang, Malaya, 07 November 1930, E.J.H. Corner n.n. (BPI 294160).

Remarks:—According to Corner's infrageneric classification (1970), Clavaria gibbsiae belongs to subgenus Holocoryne (Fr.) Bonord. because of the presence of clamps at the base of the basidia. This is probably a widespread and common tropical species ( Corner 1950) that can be mistaken for Ca. fragilis , which is also white but differs by the shape and size of the basidiospores (ellipsoid and smaller, 4.5−5.5 × 2.0−3.5 μm, in Ca. fragilis ), number of sterigmata and the absence of inner wall incrustations ( Burt 1922).

Figures

FIGURE 1. Photographs of basidiomata in the field. a Clavaria diverticulata (ACM 1044); b. Ca. fragilis (ACM 1041); c. Ca. fumosa (ACM 598); d. Ca. gibbsiae (ANMF 484); e. Ca. subglobosa (MAN 732); f. Ca. zollingeri (ANMF 365); g. Clavulinopsis amoena (KEL 21); h. Cs. aurantiocinnabarina (ANMF 382); i. Cs. dimorphica (ACM 1051); j. Cs. helvola (KEL 34); k. Cs. imperata (ANMF 482); l. Cs. laeticolor (ANMF 495); m. Cs. spiralis (MAN 1077); n. Ramariopsis kunzei (ACM 596). Bars = 1.0 cm. Photographs by Altielys C. Magnago (A, B, C, I, N) and Raquel Friedrich (G).

FIGURE 5. Microcharacters of Clavaria gibbsiae (ANMF 484). a. Basidiospores; b. Basidia; c. Hyphae from the context with intraparietal pigments. Bars = 10 μm.